Hi Werner,

Windows XP isn't eligible for a free update to Windows 10. There is simply no way to upgrade from Windows XP and keep your files, settings and programs. It isn't a limitation of Windows 10 but a built in limitation of XP.

Which ever version of Windows 10 you are upgrading to, you'll have the option of a physical disc or a digital download. Once again, check that all files and folders have been copied to an external hard drive.

You can follow the below steps to install Windows 10 on your system.

1. Head to Microsoft's Windows 10 download page and click on the link for version you need. Use 32-bit only if your computer doesn't have a 64-bit processor. Link for download is: https://www.microsof...
2. You need to save the file, and create a bootable DVD or USB thumb drive.
3. Once you have a bootable drive, navigate to it and run setup.exe. The first screen will ask if you want to get the latest updates - it's worth doing this. Accept the licence terms and if you chose to, the installer will download the latest updates. 
4. Then, it will check to make sure your system meets the minimum requirements and if it does, will show a 'Ready to install' screen.
5. Click install and your PC will reboot. You'll see a Windows logo, followed by a language selection. 
6. Keep an eye on the install as it will reboot your computer and if you don't remove the DVD or flash drive it might try to boot from it instead of your hard drive. The process should work automatically.
7. Finally, Windows 10 will boot, ask you a few questions and then ask you to sign in with your Microsoft ID. At this point you can set up the user structure you want on your PCs.
8. When you finally get to the Windows 10 desktop, allow a bit of time for Windows 10 search for drivers for your hardware.

I hope this helps in installing Window 10 successfully. Let me know in case you face any issues with the installation.

Regards,
Lokesh